Remove the system menu display settings row

ash/common/system/tray/system_tray.cc

Index: ash/common/system/tray/system_tray.cc
diff --git a/ash/common/system/tray/system_tray.cc b/ash/common/system/tray/system_tray.cc
index 75a6b093c7e8bcad0b1bfa15c65578d7ce865ab2..91e548ba9ad67d7a4f73278c1e9ba97e6d27b802 100644
--- a/ash/common/system/tray/system_tray.cc
+++ b/ash/common/system/tray/system_tray.cc
@@ -197,12 +197,6 @@ void SystemTray::CreateItems(SystemTrayDelegate* delegate) {
   AddTrayItem(new TrayBluetooth(this));
   tray_cast_ = new TrayCast(this);
   AddTrayItem(tray_cast_);
-  // TODO(jamescook): Remove this when mus has support for display management
-  // and we have a DisplayManager equivalent. See http://crbug.com/548429
-  std::unique_ptr<SystemTrayItem> tray_display =
-      delegate->CreateDisplayTrayItem(this);
-  if (tray_display)
-    AddTrayItem(tray_display.release());
   screen_capture_tray_item_ = new ScreenCaptureTrayItem(this);
   AddTrayItem(screen_capture_tray_item_);
   screen_share_tray_item_ = new ScreenShareTrayItem(this);